Automatic garage-door.



F. S. PETRSON. AUTOMATIC GARAGE DOOR. APPLICATION msn Aue. 20. I91].

1,275,594. Patented Aug. 13, 1918'.

2 SHEETS-SHEET I.

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, UNITED STATES PATENT onrron.

FRED S. PETERSON, 0F SEBASTOPOL,:GALIFORNIA, ASSIGN'OR 0F ONE-HALF T0 W ILLIAM S. BORBA, OF SEBAS'IOPOL, CALIFORNIA.

AUTOMATIC Gannon-noon.

To all whom it may concern:

Be it known that I, FRED S. PETERSON, a citizen of the United States, residing at Sebastopol, in the county of Sonoma and State of California, have invented a new and useful Automatic Garage-Door, of which the following is a specification.

The object of my invention is to provide a door for buildings, and particularly garages, adapted to be automatically opened on the approach of a vehicle, to permit of the entrance of the vehicle without the necessity of its coming to a standstill and which will not require manual opening of the door by an attendant. It is further an object of my invention to provide a door of this character which will automatically close as soon as the vehicle has entered the building. It is further my object to provide novel adjustable weighted mechanism for easily regulating the operation of the device, and to provide novel means for supporting the door in vertical position at all times and to provide novel means to cause the door to move from open to closed position and vice versa, by gravity. It is further my object to provide apparatus adapted for application to either single or double doors. These objects I attain by the mechanism shown in the accompanying drawings, in which Figure l is a front View of the invention applied to double garage doors; Fig. 2 is a section on line 22 of Fig. 1; Fig. 3 is a section on line 33 of Fig. 1; and Fig. l is a detail sectional view on line H of Fig. 1.

Like letters refer to like parts in all the views.

Referring to the accompanying drawings: A and A designate suitable depressible ve hicle run-ways pivotally supported at opposite ends by hinges O and hingedly connected to each other by the intermediate hinge N. A lever B mounted on pivot V is operatively attached to member U. At

the opposite end of lever B is a projection S slidably. engaging the slotted portion P of lever D. Lever D is pivotally mounted on pivot R and is provided with a slotted portion Q, at its end in which arm T on rod E is slidably engaged. Rod E which is vertically slidable in guides W is operatively connected to bar Y which is supported on the building front by pivot X. Bar Y carries a suitable track F from which door G is suitable suspended. Attached to the Specification of Letters Patent.

Patented Aug. 13, 1918.

Application filed August 20, 1917. Serial No. 187,195.

central upper portion of door G are supporting members H suspended by pivots I from bar J which in turn is suspended by suitable arms K, to which are mounted suitable rollers L resting on track F. Bar J is also provided with depending door guide members M which extend below the top of the door on both sides as shown in Fig.. 2 and keep it in a straight course. Adjustably mounted on levers D and B as illustrated in Figs. 1, 2 and 3, are suitable counter weights G adjustable by means of a suitable fastening member, such as thumb screw Z.

When a vehicle approaches the door, its weight on run-ways A will counteract weight 0 and tilt levers D and B, thus lowering rod E which moves bar Y and its track F into inclined position slanting downwardly from pivot X. In consequence of this inclination of the track the weight of the door G supported by members H, J, K and L will cause the door structure to roll on rollers I to the end of track F farthest from pivot K, or in other words, the door glides to open position. Depending arms M keep it parallel with the front of the building. As soon as the weight of the vehicle has left the run-way onentering the building the counter weight 0 on levers D and B will cause the mechanism to return to its original position, thus closing the door.

It is, of course,'in contemplation of my invention to arrange the device for either single or double doors.

What I claim is;

1. An automatically operated door for buildings, comprising a suspended door, a tiltable track from which the door is suspended, a vertically disposed rod connected to the outer end of the aforesaid track, pivotally mounted adjustably weighted members positioned beneath the door and connected with each other, one of said members being connected with the lower end of the aforesaid vertical rod, and a pivoted runway to which the other of the aforesaid weighted members is operatively connected, whereby depression of the runways will cause the door to open.

2. An automatically operated door for buildings, comprising a suspended door, a tiltable overhead track from which the door is suspended, a vertically disposed rod, pivotally mounted levers one of which is connected with the lower end of the rod, said levers farthest from the vertically disposed levers being positioned below the door, the rod, said sections having their ends hinged levers being pivoted together, weights adto each other to admit of an up-and down 10 justably mounted on the levers to permit of movement, whereby :the door may be oper- 5 adjusting the operation of the device, a run ated.

way comprising sections one of which is attached to the end of one of the aforesaid FRED S. PETERSON.

Copies of this patent may beobtained for five cents each, by addressing .the Commissioner of Patents, Washington, I). 0. 

